Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The transition into December involves a small decrease in the average high-temperature, dipping slightly from a mild 58.8°F (14.9°C) in November to a fresh 51.8°F (11°C). December's average low-temperature reading settles at a cold 37.6°F (3.1°C).Humidity
With an average relative humidity of 76%, December is the most humid month.Rainfall
In December, the rain falls for 11.1 days. Throughout December, 3.03" (77mm) of precipitation is accumulated. Throughout the year, there are 158.9 rainfall days, and 31.26" (794mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. December is the month with the most snowfall. Snow falls for 0.6 days and accumulates 2.01" (51mm) of snow.Daylight
With an average of 9h and 48min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:14 am and sunset at 5:11 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:21 pm EST.
Sunshine
The month with the least sunshine is December, with an average of 5.3h of sunshine.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index reading in December in Mountain Island?
Average temperature in December
Mountain Island, NC
- Average high temperature in December: 51.8°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (47.8°F).
- Average low temperature in December: 37.6°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in December
Mountain Island, NC
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in December
Mountain Island, NC
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Mountain Island, NC
- Average humidity in December: 76%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Mountain Island, NC
- Average rainfall in December: 3.03"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is October (1.93").
Average rainfall days in December
Mountain Island, NC
- Average rainfall days in December: 11.1 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in December
Mountain Island, NC
- Average snowfall in December: 2.01"
The month with the highest snowfall is December (2.01").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Mountain Island, NC
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Mountain Island, NC
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Mountain Island, NC
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is October (20.7 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in December
Mountain Island, NC
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Mountain Island, NC
- Average cloud cover in December: 43
The month with the most cloud cover is December (Cloud cover 43).
The months with the least cloud cover are June and July (Cloud cover 30).
Average visibility in December
Mountain Island, NC
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Mountain Island, North Carolina, USA
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